/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.kafka.streams.kstream.internals;

import org.apache.kafka.streams.kstream.Reducer;
import org.apache.kafka.streams.kstream.Window;
import org.apache.kafka.streams.kstream.Windows;

class KStreamWindowReduce<K, V, W extends Window> extends KStreamWindowAggregate<K, V, V, W> {
    KStreamWindowReduce(final Windows<W> windows,
                        final String storeName,
                        final Reducer<V> reducer) {
        super(
            windows,
            storeName,
            () -> null,
            (key, newValue, oldValue) -> oldValue == null ? newValue : reducer.apply(oldValue, newValue)
        );
    }
}
